Impact of wire geometry in energy extraction from salinity differences using capacitive technology.

Energy extraction based on capacitive Donnan potential (CDP) is a recently suggested technique for sustainable power generation. CDP combines the use of ion-exchange membranes and porous carbon electrodes to convert the Gibbs free energy of mixing sea and river water into electric work. The electrodes geometry has a relevant impact on internal resistance and overall performance in CDP. In this work, we present the first effort to use wire-shaped electrodes and its suitability for improving CDP. Analytical evaluation and electrical measurements confirm a strong nonlinear decrease in internal resistance for distances between electrodes smaller than 3 mm. We also demonstrated that we get more power per material invested when compared to traditional flat plate designs. These findings show the advantages of this design for further development of CDP into a mature technology.

[1]  J. Isaacs,et al.  Ocean Energy: Forms and Prospects , 1980, Science.

[2]  Dc Kitty Nijmeijer,et al.  Power generation using profiled membranes in reverse electrodialysis , 2011 .

[3]  P. M. Biesheuvel,et al.  Water Desalination with Wires. , 2012, The journal of physical chemistry letters.

[4]  R. Lacey.  Energy by reverse electrodialysis , 1980 .

[5]  P. M. Biesheuvel,et al.  A prototype cell for extracting energy from a water salinity difference by means of double layer expansion in nanoporous carbon electrodes , 2011 .

[6]  Sudipta Sarkar,et al.  The Donnan membrane principle: opportunities for sustainable engineered processes and materials. , 2010, Environmental science & technology.

[7]  G Jan Harmsen,et al.  Electrical power from sea and river water by reverse electrodialysis: a first step from the laboratory to a real power plant. , 2010, Environmental science & technology.

[8]  H. Hamelers,et al.  Effect of additional charging and current density on the performance of Capacitive energy extraction based on Donnan Potential , 2012 .

[9]  P. M. Biesheuvel,et al.  Water desalination using capacitive deionization with microporous carbon electrodes. , 2012, ACS applied materials & interfaces.

[10]  Amy E. Childress,et al.  Power generation with pressure retarded osmosis: An experimental and theoretical investigation , 2009 .

[11]  Yury Gogotsi,et al.  Charge storage mechanism in nanoporous carbons and its consequence for electrical double layer capacitors , 2010, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[12]  H. Hamelers,et al.  Faster Time Response by the Use of Wire Electrodes in Capacitive Salinity Gradient Energy Systems , 2012 .

[13]  D. Brogioli.  Extracting renewable energy from a salinity difference using a capacitor. , 2009, Physical review letters.

[14]  P. M. Biesheuvel,et al.  Charge Efficiency: A Functional Tool to Probe the Double-Layer Structure Inside of Porous Electrodes and Application in the Modeling of Capacitive Deionization , 2010 .

[15]  Kitty Nijmeijer,et al.  Doubled power density from salinity gradients at reduced intermembrane distance. , 2011, Environmental science & technology.

[16]  Jon G. Pharoah,et al.  Improved electrode systems for reverse electro-dialysis and electro-dialysis , 2012 .

[17]  T. Holt,et al.  The potential for power production from salinity gradients by pressure retarded osmosis , 2009 .

[18]  J. Post,et al.  Energy recovery from controlled mixing salt and fresh water with a reverse electrodialysis system. , 2008, Environmental science & technology.

[19]  David W. Smith,et al.  Investigation of Donnan equilibrium in charged porous materials—a scale transition analysis , 2007 .

[20]  Yi Cui,et al.  A desalination battery. , 2012, Nano letters.

[21]  P. Vanýsek.  Impact of electrode geometry, depth of immersion, and size on impedance measurements , 1997 .

[22]  Guy Z. Ramon,et al.  Membrane-based production of salinity-gradient power , 2011 .

[23]  Subrayal M. Reddy,et al.  Electrochemical disinfection, an environmentally acceptable method of drinking water disinfection? , 2005 .

[24]  Anthony T. Jones,et al.  Recent development in salinity gradient power , 2003, Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492).

[25]  Meryl D. Stoller,et al.  Review of Best Practice Methods for Determining an Electrode Material's Performance for Ultracapacitors , 2010 .

[26]  J. Veerman,et al.  Reducing power losses caused by ionic shortcut currents in reverse electrodialysis stacks by a validated model , 2008 .

[27]  R. E. Pattle.  Production of Electric Power by mixing Fresh and Salt Water in the Hydroelectric Pile , 1954, Nature.

[28]  R. van Roij,et al.  ‘Blue energy’ from ion adsorption and electrode charging in sea and river water , 2010, 1012.4946.

[29]  Lei Jiang,et al.  Energy Harvesting with Single‐Ion‐Selective Nanopores: A Concentration‐Gradient‐Driven Nanofluidic Power Source , 2010 .

[30]  Yi Cui,et al.  Batteries for efficient energy extraction from a water salinity difference. , 2011, Nano letters.

[31]  Matthew Leach,et al.  Progress in renewable energy. , 2003, Environment international.

[32]  Menachem Elimelech,et al.  Salt cleaning of organic-fouled reverse osmosis membranes. , 2007, Water research.

[33]  P. M. Biesheuvel,et al.  Direct power production from a water salinity difference in a membrane-modified supercapacitor flow cell. , 2010, Environmental science & technology.